docs: def get_user_data(self, subid, params=None):
          ''' /v1/server/get_user_data
          GET - account
          Retrieves the (base64 encoded) user-data for this subscription.
  
          Link: https://www.vultr.com/api/#server_get_user_data
          '''
          params = update_params(params, {'SUBID': subid})
          return self.request('/v1/server/get_user_data', params, 'GET')